Commitments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Line Items]
Prepaid land leasing arrangements	2
Rent expense	$ 57,226	$ 55,345	$ 57,069
Short term committed purchase obligations	71,793
Contribution by employer for employee saving plan	$ 7,768	$ 7,523	$ 6,312
Buildings
Commitments and Contingencies Disclosure [Line Items]
Terms of operating leases expiring year	Dec. 31, 2025
Land
Commitments and Contingencies Disclosure [Line Items]
Terms of operating leases expiring year	Dec. 31, 2057